@Riot: Two serious questions

1. Will there be summoner icons available for each of the various teams competing at MSI?

2. Is there / will there ever be a way to revisit the champion mastery grade a player has received for a match? I'm asking this because I did not know we got a grade after a match and now would like to know how I performed in the matches I played after champion mastery went live.

edit: One more question: What does the S in the grading scale stand for? I've been taught that S stands for satisfactory which is comparable to a C.